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ID Date Authordown Type Category Subject Text Attachments
  2541   Fri Jan 22 02:54:06 2010 AlbertoUpdateABSLOvernight measurementI'm leaving a measurement running overnight.
It should be done in about one hour.
Tomorrow morning, If you need to
  
  2543   Fri Jan 22 14:40:49 2010 AlbertoUpdateABSLOvernight measurement

    
        
 2010-01-21_PRCtransmissivityVsModel.png 
  2545   Mon Jan 25 16:30:37 2010 AlbertoUpdateABSL166 MHz sideband turned offI turned off the modulation at 166MHZ
becasue I don't need it if I'm only locking
the PRC.
  
  2546   Mon Jan 25 16:46:33 2010 AlbertoUpdateABSL166 MHz sideband turned off

    
        
  
  2550   Wed Jan 27 11:02:30 2010 AlbertoUpdateABSLPRC Cavity Length I fitted the data from scanning
the PRC by changing the beat frequency of
the auxiliary laser beam with the PSL beam.
The
 2010-01-21_PRCtransmissivityVsFit.png2010-01-21_PRCtransmissivity_EntireFreqRange_VsFit.png 
  2551   Thu Jan 28 09:14:51 2010 AlbertoConfigurationComputersc1iscey, c1iscex, c1lsc, c1asc rebootedThis morning the LSC scripts wheren't running
properly. I had to reboot c1iscey, c1iscex,
c1lsc, c1asc .
  
  2552   Thu Jan 28 09:17:32 2010 AlbertoUpdateLSC166 Modulation turned offI temporarily turned off the 166 modulation.   
  2553   Fri Jan 29 12:06:58 2010 AlbertoUpdateABSLMeasurement running today at lunch timeI just started a measuremtn that will be
running for the next hour or so. Please be
careful with the interferometer.
  
  2554   Fri Jan 29 13:14:49 2010 AlbertoUpdateABSLMeasurement running today at lunch time

    
        
  
  2560   Tue Feb 2 15:30:03 2010 AlbertoFrogsTreasureWild OatsFYI. Sitting on the top shelf of George
I found an opened jar of raspberry jam and
an opened jar of creamy peanut butter. Both
  
  2562   Tue Feb 2 18:15:47 2010 AlbertoUpdateelogElog restarted it Zach made me notice that the elog
had crashed earlier on this afternoon. 
I just restarted it with the restarting
  
  2567   Wed Feb 3 10:46:12 2010 AlbertoUpdateelogelog restarted Again, this morning Zach told me
that the elog had crashed while he was trying
to post an entry.
  
  2576   Mon Feb 8 14:13:03 2010 AlbertoUpdateABSLPLL CharacterizationLately I've been trying to improve the
PLL for the AbsL experiment so that it could
handle larger frequency steps and thus speed
 2010-02-08_Old_PDH_Box_Filter_TF_gain_knob_0_Boost_OFF.png2010-02-08_PLL_OLG_gain_knob_0_Boost_OFF.png2010-02-08_PLL_Noise_Budget.png 
  2577   Mon Feb 8 14:56:17 2010 AlbertoUpdateABSLSuddenly a much better alignment of PRCI just aligned PRM and locked PRC and I
noticed that SPOB is much higehr than it
used to be. It's now about 1800, vs 1200
  
  2579   Mon Feb 8 15:41:51 2010 AlbertoUpdateABSLSuddenly a much better alignment of PRC

    
        
  
  2581   Tue Feb 9 09:07:06 2010 AlbertoUpdateABSLPLL Characterization

    
        
 2010-02-08_PRCtransmissivity_EntireFreqRange_VsFit.png 
  2582   Tue Feb 9 10:10:58 2010 AlbertoUpdateABSLback to analogI want to try to do the measurement with
the network analyzer used as local oscillator,
instead of the Marconis that I'm using now.
  
  2604   Tue Feb 16 09:51:22 2010 AlbertoUpdateGreen Lockingtake some optics away from the ETM end table


   
        
            
  
  2605   Tue Feb 16 10:01:16 2010 AlbertoConfigurationLSCArms and PRC not lockingSince last Friday either the arms or the
PRC can't lock.
The montors show the beam flashing
  
  2608   Tue Feb 16 15:25:00 2010 AlbertoConfigurationLSCArms and PRC not locking 
 
 shock.jpg 
  2640   Thu Feb 25 15:49:05 2010 AlbertoAoGCDSNew IO Chassis for the new CDSYesterday Kiwamu and I went to Downs
to take all the available parts of the IO
chassis that Gary and I had put together
  
  2653   Wed Mar 3 18:32:25 2010 AlbertoUpdate40m Upgrading11 MHz RFPD elctronics** Please
add LISO file w/ component values.
 
 rfpd11_v2_TF.pdfrfpd11_v2_Noise.pdf 
  2655   Thu Mar 4 08:43:35 2010 AlbertoUpdate40m Upgrading11 MHz RFPD elctronics


   
        
            
 rfpd11_v2.fil 
  2656   Thu Mar 4 19:53:56 2010 AlbertoUpdate40m Upgrading11MHz PD designed adjusted for diode's resistance; 55 MHz RFPD designedAfter
reading this study done
 6x 
  2680   Thu Mar 18 12:27:56 2010 AlbertoUpdateABSLPLL reconstructed


   
        
            
  
  2702   Tue Mar 23 15:38:26 2010 AlbertoUpdateelogelog just restarted I found the elog down and I restarted it.
Then, after few seconds it was down
again. Maybe someone else was messing with
  
  2704   Tue Mar 23 22:46:43 2010 AlbertoUpdate40m UpgradingREFL11 upgradedI modified REFL11 according to the changes
lsited in this
schematic (see wiki  / Upgrade 09
 2010-03-23_REFL11_model_to_meas_comparison.png 
  2710   Wed Mar 24 14:52:02 2010 AlbertoUpdateGreen Lockingtwo NPRO PLL


   
        
            
  
  2711   Wed Mar 24 14:57:21 2010 AlbertoUpdate40m UpgradingREFL11 upgraded 
 Hartmut suggested a possible
explanation for the way the electronics transfer
  
  2715   Thu Mar 25 17:32:42 2010 AlbertoUpdate40m UpgradingREFL55 UpgradedI upgraded the old REFL199 to the new REFL55.
To do that I had to replace the old
photodiode inside, switching to a 2mm one.
 2010-03-25_REFL55_model_to_meas_comparison.png2010-03-25_REFL55_model_to_meas_comparison.png 
  2732   Mon Mar 29 21:43:27 2010 AlbertoConfigurationPSLReference Cavity PD Noise Spectrum[Rana, Alberto]
This evening we measured the noise
spectrum of the reference cavity PD used
 2010-03-29_FSS_PD_shotnoise_and_darknoise.png2010-03-29_FSS_PD_shotnoise_and_darknoise.png 
  2758   Fri Apr 2 08:52:21 2010 AlbertoUpdateelogelog restartedi just restarted the elog for the third
time in the past 12 hours.
I checked the elog.log file to debug
  
  2760   Sat Apr 3 16:07:40 2010 AlbertoConfigurationPSLReference Cavity PD Noise Spectrum I was aware of a problem on those
units since I acquired the data. Then it
wasn't totally clear to me which were the
 2010-03-29_FSS_PD_shotnoise_and_darknoise.png 
  2761   Sat Apr 3 19:54:19 2010 AlbertoUpdate40m UpgradingREFL11 and REFL55 PDs Noise SpectrumThese are the dark noise spectrum that
I measured on the 11MHz and 55MHz PD prototypes
I modified.
 2010-04-03_REFL11_darknoise.png2010-04-03_REFL55_darknoise.png 
  2763   Sun Apr 4 17:32:07 2010 AlbertoMetaphysicsGeneralnew y-arm?


   
        
            
  
  2767   Mon Apr 5 10:23:40 2010 AlbertoUpdate40m UpgradingREFL11 Low Frequency Oscilaltion ReducedAfter adding an inductor L=100uH and a
resistor R=10Ohm in parallel after the OP547A
opamp that provide the bias for the photodiode
 2010_04_05_REFL11_darknoise_with_100uH_coil_10ohm_res.png2010_04_05_REFL11_darknoise_wide_freq_window_lid_open-closed.png2010_04_05_REFL11_darknoise_wide_freq_window_lid_open-closed.png 
  2768   Mon Apr 5 10:33:12 2010 AlbertoOmnistructureElectronicssoldering iron brokenThis morning the pencil soldering iron
of our Weller WD2000M Soldering Station suddenly
stopped working and got cold after I turned
  
  2772   Mon Apr 5 13:52:45 2010 AlbertoUpdateComputersFront-ends down. RebootedThis morning, at about 12 Koji found all
the front-ends down.
At 1:45pm rebooted ISCEX, ISCEY,
  
  2775   Tue Apr 6 11:27:11 2010 AlbertoUpdateComputer Scripts / ProgramsData formats in the Agilent AG4395a Spectrum AnalyzerLately I've been trying to sort out the
problem of the discrepancy that I noticed
between the values read on the spectrum analyzer's
  
  2776   Tue Apr 6 16:55:28 2010 AlbertoUpdateComputer Scripts / ProgramsData formats in the Agilent AG4395a Spectrum Analyzer


   
        
            
  
  2779   Wed Apr 7 10:48:04 2010 AlbertoUpdateElectronicsREFL11 Noise SimulationLISO simulations confirm the estimate
of ~15nV for the noise of REFL11.
The
largest contribution comes from the 50Ohm
 rfpd11_testinput_noiseplot.pdf 
  2781   Wed Apr 7 11:11:19 2010 AlbertoUpdateElectronicsREFL11 Noise Simulation


   
        
            
 rfpd11_testinput_noiseplot.pdf 
  2782   Thu Apr 8 10:17:52 2010 AlbertoUpdate40m UpgradingREFL11 Noise Vs PhotocurrentFrom the measurements of the 11 MHz RFPD
at 11Mhz I estimated a transimpedance of
about 750 Ohms. (See attached plot.)
 2010_04_05_REFL11_ShotnoiseVsPhotocurrent.png 
  2783   Thu Apr 8 10:24:33 2010 AlbertoUpdate40m UpgradingREFL11 Noise Vs Photocurrent


   
        
            
  
  2785   Fri Apr 9 06:45:28 2010 AlbertoUpdate40m UpgradingREFL11 Noise Vs Photocurrent


   
        
            
  
  2786   Sun Apr 11 13:51:04 2010 AlbertoOmnistructureComputersWhere are the laptops?I can't find the DELL laptop anywhere in
the lab. Does anyone know where it is?
Also one of the two netbooks is missing.
  
  2789   Mon Apr 12 16:20:05 2010 AlbertoConfiguration40m UpgradingREFL55 improvedDuring the commissioning of the AS55
PD, I learned how to get a much better rejection
of the 11MHz modulation.
So I
 2010-04-12_REFL55_TF_model_to_meas_comparison.png 
  2790   Mon Apr 12 17:09:30 2010 AlbertoUpdate40m UpgradingREFL11 Noise Vs Photocurrent


   
        
            
 2010-04-09_REFL11NoiseMeasurements.png 
  2834   Thu Apr 22 21:42:24 2010 AlbertoUpdatePSLInnolight 2W Vertical Beam Profile 
 What kind of fit did you use?
How are the uncertainties in the parameters
  
  2856   Wed Apr 28 14:15:58 2010 AlbertoUpdateIOOMC alignment 
 That's interesting.
Would it be possible to write about
  
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